Lens-edge-grinding machine



L. WILHELM.

LENS EDGE GRINDING MACHINE.

APPLICATION FILED JUNE 12,.1920.

1,367,933. Patented Eeb. s, 1921.

UNITED STATES LOUIS WILHELM, OF NEW HAVEN, CONNECTICUT.

LENS-EDGE-GRINDING MACHINE.

Specification of Letters Patent.

Patented Feb. 8, 1921.

Application filed June 12, 1920. Serial No. 388,415.

To all whom it may concern Be it known that I, LOUIS WILHnLM, a citizen of the United States, residing at New Haven, in'the county of New Haven and State of Connecticut, have invented a new and useful Improvement in Lens-Edge- Grinding Machines; and I do hereby declare the following, when taken in connection with the accompanying drawings and the characters of reference marked thereon, to be a full, clear, and exact description of the same, and which said drawings constitute part of this application, and represent, in-

Figure 1, a plan view of a lens-edge grinding-machine constructed in accordance with my invention.

Fig. 2, a side view of the same.

This invention relates to an improvement in lens-edge grinding-machines of the type which includes a grinding-wheel, a lensholder adapted to present the edge of a lens to the edge of the grinding-wheel, with means for moving the grinding-wheel back and forth so that its face will be uniformly employed. In the more general construction of machines for this purpose, the grindingwheel is moved by means of an eccentric so that the movement is not at a uniform speed, but is faster at one time than at another, thus bringing more wear at one point than at another, owing to the position of the eccentric by which it is moved.

The object of this invention is to provide means for moving the grinding-wheel at uniform speed so that its entire grinding surface will be brought into use and the wear will be uniform throughout; and the invention consists in the construction hereinafter described and particularly recited in the claims.

In carrying out my invention, I employ the usual grinding-wheel 5 mounted upon a longitudinally movable driving-shaft 6 sup ported in bearings 7 and 8 on a frame 9. On the outer end of the shaft is a headlO coacting with a yoke 11 of a lever 12 which is pivoted to a bracket 13 mounted on the frame 9. This lever is connected by a link 14 with an elliptical gear 15 meshing with an elliptical gear 16 connected with a wormwheel 17 engaging a worm 18 provided with a belt-pulley 19.

The machine shown also includes the usual lens chuck-shaft 20 by which the lens 21 is supported to present its edge to the grinding-wheel. This chuck-shaft 20 has a gear 22 meshing with a pinion 28 secured to a gear-wheel 2 L meshing with a pinion of the grinding-wheel is slower at one time than at another.

I claim:

1. In a lens-edge grinding-machine, the combination with the grinding-wheel, of a longitudinally movable shaft therefor, a lever having engagement with said shaft, a link connected with said lever, elliptical gears for moving said lever, and means for moving said gears.

2. A lens-edge grinding-machine, including a grinding-wheel and a longitudinally movable shaft therefor, a lens-holding chuck-shaft, a yoke-lever having engagement with said driving-shaft, the opposite ends of the said lever fixed, a link connected with the said lever intermediate its ends, an elliptical gear with which said lever is connected, a second elliptical gear meshing with the first-mentioned elliptical gear, said sec ond elliptical gear connected with a wormgear, a worm meshing with the said wormgear, and a belt moved by the grindingwheel shaft and adapted to turn said worm and the chuck-shaft.

In testimony whereof, I have signed this specification in the presence of two subscrib.

ing witnesses.

LOUIS WILHELM.

Witnesses:

Fnnnnnro C. EARLE, J HAROLD FLYNN. 

